/Engine/Source/Runtime/Engine/Public/Subsystems/SubsystemCollection.h
Get a list of Subsystems by type
const [TArray](API\Runtime\Core\Containers\TArray)< [USubsystem](API\Runtime\Engine\Subsystems\USubsystem) * > & GetSubsystemArrayInternal ( [UClass](API\Runtime\CoreUObject\UObject\UClass) * SubsystemClass ) const